To download the (ISRO_EProcClient.zip), you must use the official ISRO e-Procurement Portal . This software is a mandatory requirement for vendors to participate in electronic bidding and digital certificate enrollment for Department of Space (DOS) tenders. Download and Installation Steps According to the official ISRO Installation Manual :
If you downloaded Isro-eprocclient.zip from a non-official source and have run the executable inside: Isro-eprocclient.zip Download